populate: fix installing dynamic linker 'ld.so'

The dynamic linker, ld.so, needs the execute bit to be set.
Detect tht the library being installed is in fact ld.so and
install it with 0755 instead of 0644.

Fix detecting src == dst.

Use a simpler command to copy src -> dst.

Also change echo to printf, get rid of 'echo -n', which is
highly non-portable.


-------- diffstat follows --------
/trunk/scripts/populate.in | 76 43 33 0 +++++++++++++++++++++++++++++-----------------------
1 file changed, 43 insertions(+), 33 deletions(-)
(transplanted from d7ddcb75e0f703e2ba6d17169167356389224870)

 --- glibc-2.7/glibc-ports-2.7.orig/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2007-06-06 19:27:04.000000000 +0200

 +++ glibc-2.7/glibc-ports-2.7/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2008-05-18 16:57:21.000000000 +0200

 @@ -73,6 +73,9 @@

  # define DOCARGS_5	DOCARGS_4

  # define UNDOCARGS_5	UNDOCARGS_4

 +# define DOCARGS_6    DOCARGS_5

 +# define UNDOCARGS_6  UNDOCARGS_5

 +

  # ifdef IS_IN_libpthread

  #  define CENABLE	bl PLTJMP(__pthread_enable_asynccancel)

  #  define CDISABLE	bl PLTJMP(__pthread_disable_asynccancel)